From: stephen hemminger <shemminger@vyatta.com>
Date: Wed, 11 Nov 2009 07:40:36 +0000 (+0000)
Subject: decnet: convert dndev_lock to spinlock
X-Git-Tag: v2.6.33-rc1~388^2~400
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e5c140a340c4796054b0f6e9035e1faa7edfa6d6;p=pandora-kernel.git

decnet: convert dndev_lock to spinlock

There is no reason for this lock to be reader/writer since
the reader only has lock held for a very brief period.
The overhead of read_lock is more expensive than spinlock.

Compile tested only, I am not a decnet user.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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